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DITEKSHEN_INDICATOR_RMM_Manageengine_Zohomeeting

Detects ManageEngine Zoho Meeting (dc_rds.exe)

Suspicious / huntingditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2023-08-22
Modified
2024-10-04
Score / Quality
75 / 75

What this rule detects

Detects ManageEngine Zoho Meeting (dc_rds.exe)

Targets: Windows PE.

It defines 8 patterns (8 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
indicator-rmm-manageengine-zohomeeting.yarBSD 2-Clause License
rule DITEKSHEN_INDICATOR_RMM_Manageengine_Zohomeeting : FILE
{
	meta:
		description = "Detects ManageEngine Zoho Meeting (dc_rds.exe)"
		author = "ditekSHen"
		id = "b15efdd1-323c-5ed6-894d-b44f04d2eaf3"
		date = "2023-08-22"
		modified = "2024-10-04"
		reference = "https://www.cisa.gov/sites/default/files/2023-08/JCDC_RMM_Cyber_Defense_Plan_TLP_CLEAR_508c_1.pdf"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/indicator_rmm.yar#L304-L324"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "8066bcd17245efcc73f2bef7f022ad23ab648fe0ad15ca66c0d387ce4eda998b"
		score = 75
		quality = 75
		tags = "FILE"
		clamav1 = "INDICATOR.Win.RMM.ManageEngine-ZohoMeeting"

	strings:
		$s1 = "bin\\ClientAuthHandler.dll" wide
		$s2 = "AgentHook.dll" wide
		$s3 = "UEMS - Remote Control" wide
		$s4 = "Install hook...." wide
		$s5 = "india.adventnet.com/meet.sas?k=" ascii
		$s6 = "dcTcpSocket::" ascii
		$s7 = "%s/%s?clientId=%s&sessionId=%s&clientName=%s&ticket=%s&connectionId=%s" ascii
		$s8 = ".\\engines\\ccgost\\gost_" ascii

	condition:
		uint16( 0 ) == 0x5a4d and 5 of them
}

Strings (8 patterns)

IdentifierTypeValueModifiers
$s1text"bin\\ClientAuthHandler.dll"wide
$s2text"AgentHook.dll"wide
$s3text"UEMS - Remote Control"wide
$s4text"Install hook...."wide
$s5text"india.adventnet.com/meet.sas?k="ascii
$s6text"dcTcpSocket::"ascii
$s7text"%s/%s?clientId=%s&sessionId=%s&clientName=%s&ticket=%s&connectionId=%s"ascii
$s8text".\\engines\\ccgost\\gost_"ascii

Condition

uint16( 0 ) == 0x5a4d and 5 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 5 patterns in the rule must match.

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References

Licence & attribution

Author: ditekSHen

Source repository: ditekSHen detection @ e76c93dcde

Licence: BSD 2-Clause License (repository licence)

Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: b15efdd1-323c-5ed6-894d-b44f04d2eaf3

Metadata

clamav1INDICATOR.Win.RMM.ManageEngine-ZohoMeeting

Tags:FILE

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